This was something touched on in my doctoral program--the fact that pain was
demonstrated differently in different ethnic groups. And the result of that
demonstration and its effect on care providers. So perhaps the point I'm
making is to try searching with the concept of ethnic groups rather than
social determinants, since some groups are more accepting/expectant of pain
demonstration, i.e., crying out, groaning, screaming, etc., while others
expect more stoicism.

However, I did a quick & dirty and found these--probably the same ones you
found.

The head of our hospice unit has asked me to find articles on this topic. I
have found a handful in PsycInfo and PsycArticles. PubMed does not include
the phrase 'social determinant* of pain'. If anyone has had to search this
subject or something similar, I would appreciate hearing how you searched
(terms, databases). Thank you.